-extern void register_font_driver (struct font_driver *driver, FRAME_PTR f);
-extern void free_font_driver_list (FRAME_PTR f);
-extern Lisp_Object font_update_drivers (FRAME_PTR f, Lisp_Object list);
+extern void register_font_driver (struct font_driver *driver, struct frame *f);
+extern void free_font_driver_list (struct frame *f);
+extern Lisp_Object font_update_drivers (struct frame *f, Lisp_Object list);